Sash-balance



(No Model.)

P. F. PIPE 8v W. V. BLI-IA.

SASH BALANGE.

No. 430,938. Patented June 24, 1890.

THE Norms rimas cul, vamo-mwa, wAsHlwsroN. n. c.

land friction wheel.

UNITED STATES APATENT OFFICE.

FRANK. F. FIFE AND IVILLIAM V. BLHA, OF ST. LOUIS, MISSOURI.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 430,938, dated June 24,1890.

Application filed January 30, 1890. Serial No. 338,694. (No model.)

To all wiz/0112, it may concern:

Be it known that we, FRANK. F. FIFE and WILLIAM V. BLHA, both of thecity of St. Louis, in the State of Missouri, have invented a certain newand useful Improvem ent in Combined Sash-Balance Elevators and Stops, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecication.

This invention relates to devices for a spring balance gear that.counteracts the gravity of the sash, in combination with afriction-stop that arrests its movement at any required point; and theinvention consists in features of novelty hereinafter fully described,and pointed out in the claims.

Figure I is a detail elevation of a windowcasing, which incloses a sashthat is controlled by our invention. Fig. II is an enlarged front viewof the combined gear and tension-spring-actuated wheel. Fig. III is anenlarged side view of the saine and shows the rotating and pressuresprings by which it is actuated and the cylinder in which it is incased.Fig. IV is a vertical section taken on line IV IV, Fig. III, and showsthe combined gear and friction wheel, the coilsprin g that actuates thesame, with the rubber inner fold and leather outer fold of the frictionsurface of said Wheel. Fig. V is a longitudinal detail of the bifurcatedspring and journal-bearing cylinder, and also shows project- Vingtherefrom the tongue of the friction-block that by the influence of itspressure-spring exerts a balance or stop friction on the gear Fig. VI isa perspective View of the friction-block- Fig. VII is a horizontalsection taken on line VII VII, Fig. III, and shows a detail of a windowsash and casing to which our device `is attached, and the Vvariousspring-propelled balance and stop elements of the invention; and Fig.VIII is a vertical section taken on line VIII VIII, Fig. III, and showsthe cylinder with its key-slots and the bifurcated key seated therein,which key is transferable from one key-slot to another to adj ust thepressure of the spiral springs.

Referring to the drawings, l represents a window-sash and 2 a casing, towhich, respecty ively, our device is attached.

3 represents a straight metal cograck, which is inlaid in the verticalside of the sash, and, preferably, is in duplicate on both sides of thesame, to which it maybe secured by screws 4 at each end or by any othersuitable means. The rack is suii'lciently inlaid in its recessed bed 5to house the cogs 6, so that their points do not project beyond theflush line of the surface edge of the sash.

7 represents hollow cylinders which house the pressure-springs and thecombined gear and friction-wheels, which cylinders are inclosed in theboxings 8 in the window-casin gs in corresponding positions adjacent tothe racks that are boxed in the sash, )referably on each side thereof.The said cylinders are provided with bifurcated forward extensions. 9,on the forward ends of which extensionsare brazed or otherwise securedthe attachment-plates IO. The said attachmentplates with said cylinderand its housed devices (hereinafter described) are inlaid at Il andsecured to the window-casing by the screws I2, which pass throughperforations 13 in said plates and engage in their screw-seats 14 insaid casing.

The attachment-plate is provided. with a large rectangular slot l5 inits center, through which is passed the geared friction-wheel and otherdevices to be housed in the cylinder.

I6 represents a dovetail sliding plate which runs in its dovetail grooveseat 17 in the attachment-plate, and which sliding plate has arectangular slot 18 in its center. The said plate, while it holdscaptive the aforesaid housed devices within the cylinder, at the sametime allows the projection of the coggear and friction-surface of thespring-actuated balance and stop wheel for its functional operation as asash gravity balance and stop. The plate when seated in positionconstitutes a buffer-stop to the spring-projected journal-bearing arms2l to limit their projection of the wheel, and also before the insertionof the cylinder within the casing it keeps the devices housed therein.The said dovetail slide is removed when said devices are in the processof insertion therein or of rcmoval from the cylinder.

19 represe'nts the inner hollow spring-propelled cylinders thatltelescope within the outer cylinders 7, and are provided at their IOOregister with the concave inner surfaces ofl the cylinders 7 and oftheir bifurcated arms 9, Within which they telescope.

22 represent axles which are loosely journaled in their perforatedbearings 23 in said bifurcated arms 21, and on said axles are fastlseated the perforate peripherally-enlarged or f diametrically-extendedhubs 24 of the combined gear and friction balance top Wheels` 25. Thesaidhubs .24, which are preferably: of cast metal, have integralunspoked boxed extensions from their central journal-bearings to thecog-gears v26 around their periphcries on the one side, and whichperipheral cogs are `preferably cast integral therewith, and on theother side said boxed hubs ex tend to the combination elasticfriction-tires that are mounted around them. The said friction-tires areconstituted of elastic rubber bed-hands 27, that are fast seated on thehubs on the contrary side to that of the cog- ,gears and peripherallysurmounting leather .friction-tires 28, that are fast mounted on saidelastic rubber beds. Now it will be seen that, as shown in Figs. II,III, IV, and VII,

the cogs extend about their own length be` yond the friction-tires, forthey have to Work 1n geared connection with the cog-racks 3,

which are housed in theirrecessed beds 5 within the sash, While thefriction-tires Work on the surface edges of said sash. veningfrictionalsurface 29 is left open clear to the periphery of the hubbetween the cogbed extension and the friction-tire, for a purposehereinafter described.

30 represents spring-boxes that are recessed Within one side of the hubs24, in which boxes are housed the coil-springs 3l. The inner terminalloops 32 of said springs are securely attached to the axles 22 by thekeys 33, that engage in said loops and said axles, and the outerterminal loops 34 are secured to one of the bifurcated journal-bearingarms 21, that carry the Wheels 25, by the screw-key 35, which engages insaid outer loop and is secured in` its screw-scat 36 in saidjournal-bearing arm.

Now it will be understood that as the coilspring is placed in thespring-box within the wheel in the required operative direction for thecog-rack on the sash, as said sash is lowered, acting on the cog-gear ofthe Wheel to wind up said spring, and as it does so the springapproximately coun'terbalances the gravity of the sash, so that theusual counterpoise- .Weights are dispensed With, as also are the`frequent consequent annoyances of broken cords and lodged Weights. Vhenthe sash is Thus the convex An inter-- actuate said friction-stop enterin combination as concomitants of the invention, for the gravity of thesash is unavoidably increased and decreased, respectively, in wetweather on the one hand and dry on the other. Therefore it is requiredthat there should, besides the spring-actuated sash-balance cog-geanbecombined the friction -stop shown and described on the other side of theWheel. This friction-tire 28, as has been described, is itself acombination-pad, having a leather Yfrictionsurface lying around anelastic rubber bed that combines the Wearing qualities of the leatherwith the elastic pressure of the :rubber.

We will now describe the adjustable springpressure devices thatelastically force the combined gear and friction wheel to its Work.

37 represents pressure blocks that work within the inner hollowcylinders v19, `and whose forward friction-tongues 33 have concave endsthat fit to the convex peripheral surfaces of the balance-stop wheels.25 between the cog-gear 26 and the friction-pads.

39 represents the minor spiralfsprings that IOO are housed and work inthe spring-chambers 40 within the inner cylinder 19, to exert theirspring-pressure on the pressure-blocks 37. The said springs areheldand-forced to their work by the disk-heads 41 of thescrew-bolts 42, thedisk-heads working within said springchambers.

43 represents the major spiral springs that are seated in thespring-chambers 44 within the outer cylinders. The said majorspiralsprings press against the flange-collars 2O lof the inner cylinders 19.The rear screwthreaded ends 45 of the bolts 42 have screwnuts 46adjustably seated thereon in the required position for the washers 47,that are in back contact With said nuts, to suiiiciently sttffen thepressure of said majorandfminor spiral springs. The said Washer is heldto its work by the adjustable bifurcated key 48, Whose forks straddlethebolt 42 and WhOsc ends are adj ustably seated, respectively, in such ofthe elongated slots 49 in -said cylinder 7 as will accord with the rightposition of said Washer that it locks and the springpressure that it isdesired should be exerted therefrom.

50 represents a groove in the rear end of the screw-bolt 42, which`provides themeans, with the aid of a screw-driver, forincreasing orreducing the pressure on the minor-spring 29, and ma said spring on theblock 37,*whose friction-pressure is thus adjusted on the pe- IIOripheral surface 29 of the drum of the cornbined gear and friction wheel25.

In conclusion, itwill be seen by the abovedescribed devices, whoseoperation has been largely pointed out above in connection with' thedescription, that the elevation and lowering of the sash are definitelycontrolled with a near approximation to the balance of its gravity bythe action of the coil-spring on the coggcar connection of thebalancewheel with the rack on the sash. At the same time, in combinationtherewith, the action of the coinbination elastic friction-pad tire,also peripherally mounted on said Wheel, and the presse ure-block 37,with frictional action on said wheel itself under the operation of theadj ustablesystem of pressure-springs, combines with the above-statedbalance action a stop action also at any required position of the sash.

Ve claim as our invention;

l. The combinationA of the rack 3, the combincd cog and frictionbalance-wheel 25, and the coil-spring 31, housed in said wheel thatactuates the same, substantially as and for the purpose set forth.

2. The combination of the rack 3, the cogwheel that gears into saidrack, the rubber tire fast mounted on said Wheel on the reversc side toits coggear, the leather frictiontire fast mounted on said rubber tire,and the coil-spring mounted within said wheel, substantially as and forthe purpose set forth.

3. The combination of the rack 3, the hollow cylinder 7, the bifurcatedextension-arms of said cylinder, the inner cylinder 19, provided withthe flange-collar 20, the journalbearing arms 2l, that project from saidcylinder, the combined cog-gear and friction balance-wheel whoseaxle-shaft is mounted in the journal-bearings of said arms 21, the saidWheel being provided with the springbox 30, the coil-actuating springhoused Within said box in said wheel, and the major pressure spiralspring 43, that pushes on said collar 20 of the inner cylinder to holdthe coggear of the balance-Wheel in gear with the rack 3 and thefriction-tire of said wheel in contact with the sash, substantially asand for the purpose set forth.

4. The combination of the rack 3, the coinbined gear and friction wheel25, Whose cogs gear into said rack and whose elasticallyrubber-beddedleather friction-tire engages with the sash, and said wheel providedwith .a peripheral friction surface 29 between said cogs and saidfriction-tire, and also provided with a spring-box 30, the coil-springthat actuates said wheel, said spring being housed in said box, thepressure-block 37, provided with the friction-tongue 38, that has afriction-pressure on said peripheral surface 29 of said Wheel, and theininor spiral spring 39,` that actuates said pressure-block,substantially as and for the purpose set forth.

5. The combination of the cog-gear rack, the combined cog-gear andelastic bedded friction balance and stop wheel 25, the coilbalance-spring 31, the hollow cylinders 7, that house said wheel and itsactuating devices, the said cylinder being provided with elongatedkey-hole slots, the inner hollow cylinder 19, provided with thejournal-bearing arms 2l, the pressure-block 37, the major and minorspiral springs 39 and 43, the spring-carrier screw-bolt42, and thebifurcated key 48, seated in the slots 49 in the cylinder 7,substantially as and for the purpose set forth.

6. The combination of the cog-gear rack, the combined cog-gear andelastically-bedded friction-tired wheel, the coil and pressure springsthat actuate said wheel, the housing and journal bearing hollowcylinders 7 and 19, that house and carry said wheel, thecentrally-slotted attachment-plate 10, with its scrcw-fastenings, bywhich said cylinder 7 is secured in its housing, said plate providedwith the dovetail grooves 17, andthe centrallyslotted dovetail slidingplate 16, said plate arranged so that while it allows sufficientprojection of the cog-gear and friction-tire of the wheel at the sametime keeps it and its actuating devices captive within its housing,substantially as and for the purpose set forth.

FRANK. F. FIFE.I W'ILLIAM V. BLllA.

In presence of- BENJN. A. KNIGHT, THos. KNIGHT.

